[Haskell-beginners] how to modify show for a list of certain types

[Manfred Lotz]

Hi there,
I have a list of say type  Record which I write to a file and
read back from the file if required.

The list's content is a single line in the file it doesn't matter how
many records the list contains.

I would like to modify show for type Record in a way that show does
work like the normal show but additionally adds a newline at the end of
the string. 

I'm a bit lost how to do that. Any idea?


-- 
Manfred